/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:57:03,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:57:03,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:57:03,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 03:57:03,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 03:57:03,947 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:57:03,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:57:03,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:57:03,948 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:57:03,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:57:03,948 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:57:03,949 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:57:03,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:57:03,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:57:03,951 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:57:03,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:57:03,952 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:57:03,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:57:03,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:57:03,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:57:03,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:57:03,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:57:03,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:57:03,955 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:57:03,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:57:03,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:57:03,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:57:03,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:57:03,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:57:03,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:57:03,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:57:03,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:57:03,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:57:03,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:57:03,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:57:03,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:57:03,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:57:03,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:57:04,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:57:04,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:57:04,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:57:04,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:57:04,298 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:57:04,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-11-24 03:57:04,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e576fd8/986a544071ca432793e002caef65adba/FLAG016ec0a62 [2019-11-24 03:57:04,798 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:57:04,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-11-24 03:57:04,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e576fd8/986a544071ca432793e002caef65adba/FLAG016ec0a62 [2019-11-24 03:57:05,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e576fd8/986a544071ca432793e002caef65adba [2019-11-24 03:57:05,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:57:05,214 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:57:05,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:57:05,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:57:05,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:57:05,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50aa6459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05, skipping insertion in model container [2019-11-24 03:57:05,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:57:05,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:57:05,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:57:05,440 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:57:05,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:57:05,463 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:57:05,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05 WrapperNode [2019-11-24 03:57:05,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:57:05,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:57:05,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:57:05,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:57:05,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:57:05,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:57:05,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:57:05,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:57:05,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:57:05,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:57:05,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:57:05,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:57:05,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:57:05,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:57:05,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:57:05,817 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:57:05,817 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 03:57:05,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:57:05 BoogieIcfgContainer [2019-11-24 03:57:05,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:57:05,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:57:05,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:57:05,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:57:05,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:57:05" (1/3) ... [2019-11-24 03:57:05,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f919d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:57:05, skipping insertion in model container [2019-11-24 03:57:05,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (2/3) ... [2019-11-24 03:57:05,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f919d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:57:05, skipping insertion in model container [2019-11-24 03:57:05,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:57:05" (3/3) ... [2019-11-24 03:57:05,827 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2019-11-24 03:57:05,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:57:05,843 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 03:57:05,855 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 03:57:05,880 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:57:05,880 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:57:05,880 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:57:05,880 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:57:05,880 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:57:05,881 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:57:05,881 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:57:05,881 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:57:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-11-24 03:57:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 03:57:05,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:05,912 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 03:57:05,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash 963404, now seen corresponding path program 1 times [2019-11-24 03:57:05,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:05,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111383756] [2019-11-24 03:57:05,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111383756] [2019-11-24 03:57:06,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:57:06,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:57:06,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780228515] [2019-11-24 03:57:06,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 03:57:06,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:57:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 03:57:06,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 03:57:06,106 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-11-24 03:57:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:57:06,155 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2019-11-24 03:57:06,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 03:57:06,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 03:57:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:57:06,166 INFO L225 Difference]: With dead ends: 14 [2019-11-24 03:57:06,166 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 03:57:06,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 03:57:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 03:57:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-24 03:57:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 03:57:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 03:57:06,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-11-24 03:57:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:57:06,202 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 03:57:06,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 03:57:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 03:57:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 03:57:06,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:06,203 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-11-24 03:57:06,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:06,204 INFO L82 PathProgramCache]: Analyzing trace with hash 925765417, now seen corresponding path program 1 times [2019-11-24 03:57:06,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:06,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894909421] [2019-11-24 03:57:06,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894909421] [2019-11-24 03:57:06,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826311152] [2019-11-24 03:57:06,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:57:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 03:57:06,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:57:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,311 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:57:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629096339] [2019-11-24 03:57:06,357 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 03:57:06,357 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:57:06,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:57:06,371 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:57:06,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:57:06,515 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:57:06,643 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 03:57:06,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:57:06,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2019-11-24 03:57:06,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973302957] [2019-11-24 03:57:06,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 03:57:06,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:57:06,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 03:57:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-24 03:57:06,646 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-24 03:57:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:57:06,669 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-24 03:57:06,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 03:57:06,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-24 03:57:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:57:06,671 INFO L225 Difference]: With dead ends: 12 [2019-11-24 03:57:06,671 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 03:57:06,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-24 03:57:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 03:57:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 03:57:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 03:57:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 03:57:06,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-24 03:57:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:57:06,680 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 03:57:06,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 03:57:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 03:57:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 03:57:06,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:06,681 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-11-24 03:57:06,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:57:06,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 602269638, now seen corresponding path program 2 times [2019-11-24 03:57:06,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:06,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455360931] [2019-11-24 03:57:06,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 03:57:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 03:57:06,924 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 03:57:06,925 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 03:57:06,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 03:57:06 BoogieIcfgContainer [2019-11-24 03:57:06,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 03:57:06,942 INFO L168 Benchmark]: Toolchain (without parser) took 1726.65 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 106.6 MB in the beginning and 116.1 MB in the end (delta: -9.5 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,943 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-24 03:57:06,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.49 ms. Allocated memory is still 148.9 MB. Free memory was 106.6 MB in the beginning and 97.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 124.37 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 97.2 MB in the beginning and 184.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,946 INFO L168 Benchmark]: Boogie Preprocessor took 18.54 ms. Allocated memory is still 206.0 MB. Free memory was 184.8 MB in the beginning and 183.9 MB in the end (delta: 901.1 kB). Peak memory consumption was 901.1 kB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,947 INFO L168 Benchmark]: RCFGBuilder took 211.35 ms. Allocated memory is still 206.0 MB. Free memory was 183.9 MB in the beginning and 173.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,948 INFO L168 Benchmark]: TraceAbstraction took 1119.54 ms. Allocated memory is still 206.0 MB. Free memory was 172.2 MB in the beginning and 116.1 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:06,952 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.49 ms. Allocated memory is still 148.9 MB. Free memory was 106.6 MB in the beginning and 97.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 124.37 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 97.2 MB in the beginning and 184.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.54 ms. Allocated memory is still 206.0 MB. Free memory was 184.8 MB in the beginning and 183.9 MB in the end (delta: 901.1 kB). Peak memory consumption was 901.1 kB. Max. memory is 7.1 GB. * RCFGBuilder took 211.35 ms. Allocated memory is still 206.0 MB. Free memory was 183.9 MB in the beginning and 173.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1119.54 ms. Allocated memory is still 206.0 MB. Free memory was 172.2 MB in the beginning and 116.1 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i=0; [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 3 SDslu, 5 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 216 SizeOfPredicates, 1 NumberOfNonLiveVariables, 14 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...